36
Start-up
Type 3281
• Reset time of the process controller.
The reset time determines the I part of the PID controller.
• Derivative time of the process controller.
The derivative time determines the D part of the PID controller.
• Filtering of the process actual value input.
The filter of the input signal has a low-pass behavior and can be set in several stages.
Adjustment of the filter effect
Setting
Corresponds to cut-off fre
-
quency (Hz)
Effect
0
10
minimum filter effect
1
5
2
2
3
1
4
0.5
5
0.2
6
0.1
7
0.07
8
0.05
9
0.03
greatest filter effect
8.6.5
P.SIM - Simulation of the process
With this function, the process can be simulated. The following parameters can be set:
SIM.Gain
Set gain factor
SIM.Delay
Set time constant in seconds
Example of a simulated process:
63%
1
SIM. Gain
(gain factor [Kp])
t
SIM. Delay
(time constant [T] in s)
Output of the simulated
process
Input of the simulated
process
y
u
5
Fig. 18: Example of a simulated process. Behaviour of the PT1 element
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